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Start ShoppingMikuni FN102221-125 High Speed Jet - Precision Fuel Delivery for Power & Performance
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Description
Upgrade your engine's performance with the Mikuni FN102221-125 High Speed Jet, engineered for precision fuel delivery and maximum power output. This specialized jet ensures optimal air-fuel ratios for high-speed riding, delivering consistent performance whether you're on the track or the trail.
Key Features
- Adjustable Needle Design: Customizable fuel mapping for varying riding conditions and engine modifications.
- Durable Stainless Steel Construction: Resists corrosion and maintains precision in extreme temperatures.
- Precision Fuel Metering: Ensures consistent fuel flow for reliable power delivery across RPM ranges.
- Universal Compatibility: Designed to fit Mikuni carburetor systems for seamless integration.
Why Choose This Product
Engineers for high-performance applications, this jet combines durability with precision to enhance throttle response and fuel efficiency. Its robust design reduces maintenance needs, while the adjustable needle allows riders to fine-tune performance for street, track, or off-road use. Trust Mikuni's reputation for quality to unlock your engine's full potential.
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Upgrade your engine's performance with the Mikuni FN102221-125 High Speed Jet, engineered for precision fuel delivery and maximum power output. This specialized jet ensures optimal air-fuel ratios for high-speed riding, delivering consistent performance whether you're on the track or the trail.
Key Features
- Adjustable Needle Design: Customizable fuel mapping for varying riding conditions and engine modifications.
- Durable Stainless Steel Construction: Resists corrosion and maintains precision in extreme temperatures.
- Precision Fuel Metering: Ensures consistent fuel flow for reliable power delivery across RPM ranges.
- Universal Compatibility: Designed to fit Mikuni carburetor systems for seamless integration.
Why Choose This Product
Engineers for high-performance applications, this jet combines durability with precision to enhance throttle response and fuel efficiency. Its robust design reduces maintenance needs, while the adjustable needle allows riders to fine-tune performance for street, track, or off-road use. Trust Mikuni's reputation for quality to unlock your engine's full potential.
| SKU | GM37190C75 |
|---|---|
| MPN | FN102221-125 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Multiple carbureted models (e.g., Honda CB, Yamaha XS, Suzuki GS, Kawasaki KZ) | 1985-2024 |
| Honda | XR series (XR250R, XR400R, XR650L) | 1990-2010 |
| Yamaha | XT series (XT250, XT350, XT550) | 1980-2005 |
Frequently Asked Questions
Fits most Mikuni VM, BS30/34/38/40, TM series carbs found on Honda, Yamaha, Suzuki, Kawasaki models.
This is a high speed (main) jet for primary circuit above 1/4 throttle.
Larger jet size like #125 richens fuel mixture; tune based on exhaust color and plug reads for your setup.
Single jet for custom tuning; consider full rejet kit if changing air filter/exhaust.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet wrench or needle nose pliers
Pro Tips
- Remove carb completely for best access. Clean needle jet and slide while apart. Use jet gauge to confirm size.
Common Mistakes to Avoid
- Dropping jet into carb body (hard to retrieve)
- Not cleaning carb before install
Comparison vs Stock/OEM
Direct OEM replacement or upgrade for richer fueling in modified engines
Improvements
- Precise fuel metering for altitude/temp changes
- Better for performance mods (exhaust, air filter)
Considerations
- May require smaller pilot for low-speed sync
Durability & Warranty
Expected Lifespan
Indefinite with proper maintenance (carb rebuild every 50-100 hours)
Warranty
Limited lifetime from Mikuni against defects
Maintenance
Inspect during carb cleaning; replace if eroded or clogged
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